<template>
    <div class="login_container">
        <div class="loginmain">
            <!-- 图标区域 -->
            <div class="login_imgbox">
                <img src="../assets/logo.png" alt="" class="login_img">
            </div>
            <!-- 登录表单区域 -->
            <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
                <!-- 账户输入框 -->
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-icon-1"></el-input>
                </el-form-item>
                <!-- 密码输入框 -->
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password" prefix-icon="iconfont icon-icon-" type = password></el-input>
                </el-form-item>
                <!-- 按钮区域 -->
                <el-row class="btns">
                    <el-button type="info" @click="resetLoginForm()">重置</el-button>
                    <el-button type="primary" @click="login()">登录</el-button>
                </el-row>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
  data () {
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      loginFormRules: {
        // 用户名检验
        username: [
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 用户密码检验
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    // 点击重置按钮，重置登录表单
    resetLoginForm () {
      // console.log(this);
      this.$refs.loginFormRef.resetFields()
    },
    // 登录成功提示
    successArlet () {
      this.$message({
        message: '恭喜你，登录成功!',
        type: 'success'
      })
    },
    // 登陆失败提示
    errorArlet () {
      this.$message.error('抱歉，登录失败!')
    },
    login () {
      // 难点！！！
      this.$refs.loginFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginForm)
        if (res.meta.status !== 200) return this.errorArlet()
        this.successArlet()
        // 将登录成功之后的token，保存到客户端的 sessionStorage中
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/Home')
      })
    }
  }
}
</script>

<style lang="less" scoped>
    .login_container{
        position: relative;
        background-color: #2b4b6b;
        height: 100%;
        .login_img{
            width: 130px;
            height: 130px;
        }
        .loginmain{
        position: absolute;
        width: 450px;
        height: 300px;
        background-color: #fff;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);
        .login_imgbox{
            width: 130px;
            height: 130px;
            border: 1px solid #eee;
            border-radius: 50%;
            padding: 10px;
            box-shadow: 0 0 10px #ddd;
            position: absolute;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: #fff;
            .login_img{
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
        }
    }
    }
    .btns {
        display: flex;
        // flex-direction:row;
        //弹性布局,元素在主轴上由右或者下开始排列
        justify-content: flex-end;
    }
    .login_form {
        position: absolute;
        bottom: 0;
        width: 100% ;
        padding: 0 20px;
        box-sizing: border-box;
    }
</style>
